AGENTS.md

This file provides guidance to AI coding agents (Claude Code, Cursor, Copilot, Antigravity, etc.) when working with code in this repository.

Repository Overview

A collection of skills for Claude.ai and Claude Code for embedded systems and AE (Application Engineers). Covers firmware development, RTOS-based design, peripheral drivers, and embedded debugging. Skills are packaged instructions and scripts that extend Claude and your coding agents capabilities.

OpenCode Integration

OpenCode uses a skill-driven execution model powered by the skill tool and this repository's /skills directory.

Core Rules

• If a task matches a skill, you MUST invoke it
• Skills are located in skills/<skill-name>/SKILL.md
• Never implement directly if a skill applies
• Always follow the skill instructions exactly (do not partially apply them)

Intent → Skill Mapping

The agent should automatically map user intent to skills:

• Feature / new functionality → spec-driven-development, then incremental-implementation, test-driven-development
• Planning / breakdown → planning-and-task-breakdown
• Bug / failure / unexpected behavior → debugging-and-error-recovery
• Code review → code-review-and-quality
• Refactoring / simplification → code-simplification
• API or interface design → api-and-interface-design

Lifecycle Mapping (Implicit Commands)

OpenCode does not support slash commands like /spec or /plan.

Instead, the agent must internally follow this lifecycle:

• DEFINE → spec-driven-development
• PLAN → planning-and-task-breakdown
• BUILD → incremental-implementation + test-driven-development
• VERIFY → debugging-and-error-recovery
• REVIEW → code-review-and-quality
• SHIP → shipping-and-launch

Execution Model

For every request:

1. Determine if any skill applies (even 1% chance)
2. Invoke the appropriate skill using the skill tool
3. Follow the skill workflow strictly
4. Only proceed to implementation after required steps (spec, plan, etc.) are complete

Anti-Rationalization

The following thoughts are incorrect and must be ignored:

• "This is too small for a skill"
• "I can just quickly implement this"
• "I’ll gather context first"

Correct behavior:

• Always check for and use skills first

This ensures OpenCode behaves similarly to Claude Code with full workflow enforcement.

Orchestration: Personas, Skills, and Commands

This repo has three composable layers. They have different jobs and should not be confused:

• Skills (skills/<name>/SKILL.md) — workflows with steps and exit criteria. The how. Mandatory hops when an intent matches.
• Personas (agents/<role>.md) — roles with a perspective and an output format. The who.
• Slash commands (.claude/commands/*.md) — user-facing entry points. The when. The orchestration layer.

Composition rule: the user (or a slash command) is the orchestrator. Personas do not invoke other personas. A persona may invoke skills.

The only multi-persona orchestration pattern this repo endorses is parallel fan-out with a merge step — used by /ship to run code-reviewer, security-auditor, and test-engineer concurrently and synthesize their reports. Do not build a "router" persona that decides which other persona to call; that's the job of slash commands and intent mapping.

See agents/README.md for the decision matrix and references/orchestration-patterns.md for the full pattern catalog.

Claude Code interop: the personas in agents/ work as Claude Code subagents (auto-discovered from this plugin's agents/ directory) and as Agent Teams teammates (referenced by name when spawning). Two platform constraints align with our rules: subagents cannot spawn other subagents, and teams cannot nest. Plugin agents silently ignore the hooks, mcpServers, and permissionMode frontmatter fields.

Creating a New Skill

Directory Structure

skills/
  {skill-name}/           # kebab-case directory name
    SKILL.md              # Required: skill definition
    scripts/              # Required: executable scripts
      {script-name}.sh    # Bash scripts (preferred)
  {skill-name}.zip        # Required: packaged for distribution

Naming Conventions

• Skill directory: kebab-case (e.g. web-quality)
• SKILL.md: Always uppercase, always this exact filename
• Scripts: kebab-case.sh (e.g., deploy.sh, fetch-logs.sh)
• Zip file: Must match directory name exactly: {skill-name}.zip

SKILL.md Format

---
name: {skill-name}
description: {One sentence describing what the skill does, followed by one or more "Use when" trigger conditions. Include trigger phrases like "Deploy my app" or "Check logs" when helpful.}
---

# {Skill Title}

{Brief overview of what the skill does and why it matters.}

## How It Works

{Numbered list explaining the skill's workflow}

Equivalent headings like `Workflow`, `Core Process`, or `When to Use` are fine when they communicate the same structure clearly.

## Usage (Optional)

Include this section only if the skill ships runnable helpers under `scripts/`. Markdown-only skills can omit both the section and the directory entirely.

```bash
bash /mnt/skills/user/{skill-name}/scripts/{script}.sh [args]

Arguments:

• arg1 - Description (defaults to X)

Examples: {Show 2-3 common usage patterns}

Output

{Show example output users will see}

Present Results to User

{Template for how Claude should format results when presenting to users}

Troubleshooting

{Common issues and solutions, especially network/permissions errors}

### Best Practices for Context Efficiency

Skills are loaded on-demand — only the skill name and description are loaded at startup. The full `SKILL.md` loads into context only when the agent decides the skill is relevant. To minimize context usage:

- **Keep SKILL.md under 500 lines** — put detailed reference material in separate files
- **Write specific descriptions** — helps the agent know exactly when to activate the skill
- **Use progressive disclosure** — reference supporting files that get read only when needed
- **Prefer scripts over inline code** — script execution doesn't consume context (only output does)
- **File references work one level deep** — link directly from SKILL.md to supporting files

### Script Requirements

- Use `#!/bin/bash` shebang
- Use `set -e` for fail-fast behavior
- Write status messages to stderr: `echo "Message" >&2`
- Write machine-readable output (JSON) to stdout
- Include a cleanup trap for temp files
- Reference the script path as `/mnt/skills/user/{skill-name}/scripts/{script}.sh`

### Creating the Zip Package

After creating or updating a skill:

```bash
cd skills
zip -r {skill-name}.zip {skill-name}/

End-User Installation

Document these two installation methods for users:

Claude Code:

cp -r skills/{skill-name} ~/.claude/skills/

claude.ai: Add the skill to project knowledge or paste SKILL.md contents into the conversation.

If the skill requires network access, instruct users to add required domains at claude.ai/settings/capabilities.